<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Reference: symbols function, invalid</title>
<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org/">
<link rel="stylesheet" href="support/ref-common.css">
<div>-2</div>
<div>-1</div>
<div>0</div>
<div>⚪</div>
<div>⚫</div>
<div>⚪⚪</div>
<div>⚪⚫</div>
<div>⚫⚪</div>
<div>⚫⚫</div>
<div>⚪⚪⚪</div>